/*
 * Copyright 2008 The Apache Software Foundation Licensed under the Apache
 * License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
 * or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

package org.apache.ibatis.ibator.generator.ibatis2.dao.elements;

import java.util.Set;
import java.util.TreeSet;

import org.apache.ibatis.ibator.api.dom.java.FullyQualifiedJavaType;
import org.apache.ibatis.ibator.api.dom.java.Interface;
import org.apache.ibatis.ibator.api.dom.java.JavaVisibility;
import org.apache.ibatis.ibator.api.dom.java.Method;
import org.apache.ibatis.ibator.api.dom.java.Parameter;
import org.apache.ibatis.ibator.api.dom.java.TopLevelClass;

/**
 * @author Jeff Butler
 */
public class UpdateByExampleSelectiveMethodGenerator extends
		AbstractDAOElementGenerator
{

	@Override
	public void addImplementationElements(TopLevelClass topLevelClass)
	{
		Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
		Method method = getMethodShell(importedTypes);

		method.addBodyLine("UpdateByExampleParms parms = new UpdateByExampleParms(record, example);"); //$NON-NLS-1$

		StringBuilder sb = new StringBuilder();

		sb.append("int rows = "); //$NON-NLS-1$

		sb.append(daoTemplate.getUpdateMethod(
				introspectedTable.getIbatis2SqlMapNamespace(),
				introspectedTable.getUpdateByExampleSelectiveStatementId(),
				"parms")); //$NON-NLS-1$
		method.addBodyLine(sb.toString());

		method.addBodyLine("return rows;"); //$NON-NLS-1$

		if (ibatorContext.getPlugins()
				.daoUpdateByExampleSelectiveMethodGenerated(method,
						topLevelClass, introspectedTable))
		{
			topLevelClass.addImportedTypes(importedTypes);
			topLevelClass.addMethod(method);
		}
	}

	@Override
	public void addInterfaceElements(Interface interfaze)
	{
		if (getExampleMethodVisibility() == JavaVisibility.PUBLIC)
		{
			Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
			Method method = getMethodShell(importedTypes);
			addMethodComment(method, "根据条件更新属性不为空的记录");
			if (ibatorContext.getPlugins()
					.daoUpdateByExampleSelectiveMethodGenerated(method,
							interfaze, introspectedTable))
			{
				interfaze.addImportedTypes(importedTypes);
				interfaze.addMethod(method);
			}
		}
	}

	private Method getMethodShell(Set<FullyQualifiedJavaType> importedTypes)
	{
		FullyQualifiedJavaType parameterType;

		if (introspectedTable.getRules().generateRecordWithBLOBsClass())
		{
			parameterType = new FullyQualifiedJavaType(
					introspectedTable.getRecordWithBLOBsType());
		}
		else
			if (introspectedTable.getRules().generateBaseRecordClass())
			{
				parameterType = new FullyQualifiedJavaType(
						introspectedTable.getBaseRecordType());
			}
			else
			{
				parameterType = new FullyQualifiedJavaType(
						introspectedTable.getPrimaryKeyType());
			}

		importedTypes.add(parameterType);

		Method method = new Method();
		method.setVisibility(getExampleMethodVisibility());
		method.setReturnType(FullyQualifiedJavaType.getIntInstance());
		method.setName(getDAOMethodNameCalculator()
				.getUpdateByExampleSelectiveMethodName(introspectedTable));
		method.addParameter(new Parameter(parameterType, "record")); //$NON-NLS-1$
		method.addParameter(new Parameter(new FullyQualifiedJavaType(
				introspectedTable.getExampleType()), "example")); //$NON-NLS-1$

		for (FullyQualifiedJavaType fqjt : daoTemplate.getCheckedExceptions())
		{
			method.addException(fqjt);
			importedTypes.add(fqjt);
		}

		ibatorContext.getCommentGenerator().addGeneralMethodComment(method,
				introspectedTable);

		return method;
	}
}
